La. R.S. 9:1963

Except as otherwise provided with respect to class trusts and the legitime in trust, a settlor may stipulate when the income allocated to a beneficiary shall be distributed to him, or may stipulate that the trustee has discretion to determine the time and frequency of distribution. If the trust instrument allows the trust to retain income received in a year of the trust and distribute it in a later year, the income retained at the end of the year is deemed to be accumulated, unless the trust instrument requires the undistributed income to be added to principal. Objective standards are not required for the accumulation of income or for the distribution of accumulated income.